Magma Chamber: magma collects in a pocket beneath a volcano. Pipe: a long tube in the ground that connects the magma chamber to Earth's surface. Vent: an opening where molten rock and gas leave the volcano. Lava Flow: an area covered by lava as it pours out of a vent. Crater: a bowl-shaped area that may form at the top of a volcano around the volcanoes central vent. Silicia: material that is formed from the elements oxygen and silicon, is one of the most abundant materials in Earth's crust and mantle. Pahoehoe: is fast moving, hot lava Aa: is slow moving, cool lava. Pyroclastic flow: occurs when an explosive eruption hurls out ash, cinders, and bombs as well as gases. Active: live volcano that is erupting or showing signs that it might erupt in the near future. Dormant: sleeping volcano wakens in future and erupts. Extinct: dead volcano that is unlikely to erupt again. Hot Spring: forms when underground water is heated by a nearby body of magma, rises to the surface and collects in a natural pool. Geothermal Energy: a clean, reliable energy source provided by water heated by magma.
Outline:
Volcanic Activity
How Magma reaches Earth's Surface
magma rises
volcano erupts
during eruption, magma rushes out
Inside a volcano
magma chamber
pipe
vent
lava flow
crater
Characteristics of Magma
silicia
Types of Volcanic Eruptions
silicia determines eruption- quiet/explosive
quiet eruptions
pahoehoe
aa
explosive eruptions
pyroclastic flow
Stages of a volcano
active
dormant
extinct
Other types of Volcanic Activity
hot spring
geothermal energy
Monitoring Volcanoes
easier predict volcano than earthquake
Volcano Hazards
people living near dormant earthquakes- unaware of danger
Table of Contents
Volcanic Activity 3.2
Vocabulary:
Magma Chamber: magma collects in a pocket beneath a volcano.
Pipe: a long tube in the ground that connects the magma chamber to Earth's surface.
Vent: an opening where molten rock and gas leave the volcano.
Lava Flow: an area covered by lava as it pours out of a vent.
Crater: a bowl-shaped area that may form at the top of a volcano around the volcanoes central vent.
Silicia: material that is formed from the elements oxygen and silicon, is one of the most abundant materials in Earth's crust and mantle.
Pahoehoe: is fast moving, hot lava
Aa: is slow moving, cool lava.
Pyroclastic flow: occurs when an explosive eruption hurls out ash, cinders, and bombs as well as gases.
Active: live volcano that is erupting or showing signs that it might erupt in the near future.
Dormant: sleeping volcano wakens in future and erupts.
Extinct: dead volcano that is unlikely to erupt again.
Hot Spring: forms when underground water is heated by a nearby body of magma, rises to the surface and collects in a natural pool.
Geothermal Energy: a clean, reliable energy source provided by water heated by magma.
Outline:
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